Dorsey, who came off the injured reserve list this week, continues to experience problems following surgery to repair a biceps tear.
''I have no doubts,'' Dorsey said Friday after being declared out, along with tackle Anthony Davis, who continues to experience post-concussion symptoms. ''We'll see how it goes. We have to work with it.''
Jonathan Martin is set to make his sixth start of the season at right tackle in Davis' place.
Linebacker NaVorro Bowman, out all season following knee surgery, was scheduled to visit with his surgeon, Dr. James Andrews, with the plan of setting up his practice schedule for next week.
''He's a taller guy but he has a low center of gravity,'' Dorsey said of Dial. ''He just has to stay low and stay with his techniques. He's big enough and strong enough. He's a good player.''
Linebacker Aldon Smith, who returned from a nine-game suspension to play the majority of the 49ers' victory over the Giants on Sunday, said he's ready for his first home game of the year.
''It will be exciting getting back out there,'' he said. ''I was a little sore Monday but I was more sore after my first day of practice. I started off slow but as the game went on it got better.''
Smith said he's preparing for the athleticism of Redskins' quarterback Robert Griffin III (RG3) this weekend.
''If he takes off running he can hurt you, but he also has a good arm,'' Smith said. ''You have to be thinking about that when you rush him. We have to keep a consistent pass rush out there.''
''There's a lot of film on him,'' Smith said. ''I try to pick up tendencies but at the end of the day, I have to be on my game.''
Dorsey also weighed in on Smith, saying he's the last guy he needs to worry about.
''He works hard, he plays hard and he makes plays,'' Dorsey said.
NOTES: CB Tramaine Brock (hamstring), TE Vance McDonald (hip), LB Dan Skuta (ankle) and WR Bruce Ellington (ankle) are listed as questionable. Neither Brock nor Ellington participated in Friday's practice and McDonald and Skuta were limited. . LB Chris Borland (shoulder), named Pepsi's Rookie of the Week, is listed as probable along with WR Brandon Lloyd (quadriceps) and DL Justin Smith (non-injury related). They all practiced. . LB Patrick Willis tweeted he underwent successful surgery on his toe. There is no timetable for when he'll return to the field. . 49ers coach Jim Harbaugh looked surprised when he found out, through a question, that he's ninth on the all-time rushing yardage list for quarterbacks. ''Don't feel like you have to keep that to yourselves,'' he said. Comparing himself to QB Colin Kaepernick: ''I was mediocre; he is great.''